1. The word "class" is a pain point with many languages where
it's a keyword. Type is a little better. Also, the property
was already named "device_type" and not "device_class".
2. Remove Efl.Input.Device.Sub_Class
It's not used inside EFL upstream codebase, and unlikely to
be used anywhere else (even in Tizen).
Hopefully no one used the Efl_ enum types. So far only the Evas_
types should be in used.
Ref T5540
Those are now merged with Efl.Object parent, name and comment.
The reasoning is that only seats can be parent devices; And name
and description are not only name clashes but also not extremely
useful anyway.
Tested with VNC.
Fixes T5540
Since seat names defined on evas will depend on evas backends,
maybe udev rules, etc, we aren't able to demonstrate it
without manually setting another name for such seats
with efl_input_devices_name_set(). Otherwise
we wouldn't have guarantees it would match
names on EDC.